親子觀星會

GW Orionis  3  重星 triple star system 
  T Tauri type pre-main sequence
https://en.wikipedia.org/wiki/GW_Orionis


GG Tauri  4 重星 quadruple o  5重星  quintuple 
https://en.wikipedia.org/wiki/GG_Tauri

GG Tauri A  跟另外一組 Ba  Bb 繞, 更遠還有 另一組雙星,  可能是    5重星

(https://upload.wikimedia.org/wikipedia/commons/thumb/2/22/Artist%E2%80%99s_impression_of_the_double-star_system_GG_Tauri-A.jpg/390px-Artist%E2%80%99s_impression_of_the_double-star_system_GG_Tauri-A.jpg)


https://www.ifa.hawaii.edu/ao/OLDSITE/images/TTauri/GGTauJ.html

(https://www.ifa.hawaii.edu/ao/OLDSITE/images/TTauri/GGTauJ.gif)